For this part of the project and based on the class sample, you will use a 95% confidence interval for the mean age and the proportion of males in the population of all online college students.

For the average age, form a 95% confidence interval: o What distribution should be used? o What is the critical value? o What is the error bound? o What is the lower bound? o What is the upper bound? o How do we interpret the results, in context of our study? For the proportion of males, form a 95% confidence interval: o What distribution should be used? o What is the critical value? o What is the error bound? o What is the lower bound? o What is the upper bound? o How do we interpret the results, in context of our study?

Note: The goal of the project is to practice making a confidence interval for a mean and proportion with real data. Do not worry about failed assumptions tests and do not make corrections for small sample size. Use primary methods described in text and used on homework.

Age

Gender

Points

95% Confidence Interval for Average Age of Online College Students:

17

M

19

M

Sample Mean:

34.22

Note: Calculation cells should list the numbers and operations used to get your answers. Do not put the generic formula and show all calculation steps.

20

F

Sample St. Dev:

13.05

22

F

1

Sample Size:

18

24

M

25

F

2

Distribution:

25

F

30

F

2

Critical Value:

*2 decimals

30

F

32

F

2

Margin of Error:

*2 decimals

Calculation:

35

F

1

Lower Bound:

*2 decimals

Calculation:

39

M

1

Upper Bound:

*2 decimals

Calculation:

43

F

43

M

Interpret (context)

45

M

2

52

F

56

F

95% Confidence Interval for Proportion of Male Online College Students:

59

F

1

Sample Size:

1

Number of Males:

2

Male Proportion:

Female Proportion

*4 decimals

2

Distribution:

2

Critical Value:

*2 decimals

2

Margin of Error:

*4 decimals

Calculation:

1

Lower Bound:

*4 decimals

Calculation:

1

Upper Bound:

*4 decimals

Calculation:

Interpret (context)

2

25

Total Points